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  1. Josephson effect
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Josephson voltage standard by Ciro Santilli 34 Updated 2024-11-19 Created 1970-01-01
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The most practical/precise volt standard.
It motivated the definition of the ampere in the 2019 redefinition of the SI base units
The wiki page en.wikipedia.org/wiki/Josephson_voltage_standard contains amazing schematics of the device, apparently made by the US Government.
Figure 1. Source.
Video 1.
The evolution of voltage metrology to the latest generation of JVSs by Alain Rüfenacht
. Source. Talk given in 2023. The speaker is from NIST, and the talk was hosted by the BIPM. Fantastic talk.
Video 2.
Technical aspects of realizing the DC volt in the laboratory with a JVS by Stéphane Solve
. Source. Talk given in 2023. The speaker is from BIPM, and the talk was hosted by the BIPM. Fantastic talk.
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